Netgear M4100-D12G (GSM5212v1h1) - 10‐port GE + 2 GE Combo L2 Managed PD Switch Manual De Usuario

Integrated Services: Network resources are apportioned based on request and are 
reserved (resource reservation) according to network management policy (RSVP, for 
example).

Differentiated Services: Network resources are apportioned based on traffic 
classification and priority, giving preferential treatment to data with strict timing 
requirements.

The managed switch support DiffServ. 

The DiffServ feature contains a number of conceptual QoS building blocks you can use to 
construct a differentiated service network. Use these same blocks in different ways to build 
other types of QoS architectures.

There are 3 key QoS building blocks needed to configure DiffServ:

Class

Policy

Service (for example, the assignment of a policy to a directional interface)

You can classify incoming packets at Layers 2, 3 and 4 by inspecting the following 
information for a packet:

Source/destination MAC address

EtherType

Class of Service (802.1p priority) value (first/only VLAN tag)

VLAN ID range (first/only VLAN tag)

Secondary 802.1p priority value (second/inner VLAN tag)

Secondary VLAN ID range (second/inner VLAN tag)

IP service type octet (also known as: ToS bits, precedence value, DSCP value)

Layer 4 protocol (TCP, UDP, and so on)

Layer 4 source/destination ports

Source/destination IP address

From a DiffServ point of view, there are two types of classes:

DiffServ traffic classes

DiffServ service levels/forwarding classes

With DiffServ, you define which traffic classes to track on an ingress interface. You can define 
simple BA classifiers (DSCP) and a wide variety of multifield (MF) classifiers:

Layer 2; Layers 3, 4 (IP only)